It is behind many of the 'improvements', but the safety/liability issues are not led by legislation. The governments of this world are generally interested in emissions, not safety standards. Those have largely been left to the various NCAP organisations and the likes of IIHS, who have standards (in passive safety) waaaay over anything in the Regs.
From another angle, while car companies are offering customers the current levels of power (Camries making more HP than Carrera 2.7RSs??!) to the average customer, these 'aids' are necessary. One, to protect the road-users and Two, which is in alignment with your point, to appear 'responsible'.
As before, one's driving engagement and complacency is what one makes of it, ESC/TC/poor steering feel,etc, etc fall to the wayside when we consider the amount of distractions open to the modern driver....mobile phones, complicated dashes, stupid instrument layouts, isolation from road/surrounding noises and....cupholders